Mami loses her husband and lives with her beloved daughter Yui in the home left to her by her parents. One afternoon, while Mami was away, she was burglarized. Her culprit is Sugiura, who works part-time at her girlfriend Mami's place. He committed the crime after becoming overwhelmed with debt. Mami has the misfortune of running into Sugiura, who is looking for valuables...